What's with all the history of the NES in Europe questions? I would ask if we are doing your homework but this feels more like we are doing a research thesis instead as I doubt any normal homework would be this, or if it is then it is one of those "own topic" things teachers allow to have a student fail and realise that they might have bitten off more than they could chew.
Also why would this site be a good place to ask? This is neither a NES focused site (though even nesdev would probably struggle here for reasons I am about to cover) nor a game history focused site (in one of your earlier things I already mentioned how game history from around then is very hazy --
https://www.gamasutra.com/view/feature/167392/sad_but_true_we_cant_prove_when_.php https://www.theverge.com/2015/9/14/9324833/super-mario-brothers-30th-anniversary-date ), and beyond that the "Scene"* was not really a thing for the NES while the NES was active and whatever there was** was not terribly unified -- such a lack of unity carried on through the console scenes until late PS1 era (which still means most of the PS1 was a mess). Certainly there are those that enjoy the occasional discussion about the NES (or older games in general), about game history (much less the history of games in the UK) and about Scene things but it is still odd.
*The Scene itself is not really tied to commercial releases in the way you probably want -- for many years getting something ahead of street date (sometimes months) was a coup, and for other things then things that fewer people cared about then it could be missed and be released after the fact, or when anti piracy protection was cracked.
**while there were unofficial releases (see Tengen's efforts), cloned games (I know less here but there are designs from around then on adding different chips), cheats (the court case involving Galoob being of interest to more than just games), so called Hong Kong mappers and interesting dealings but more kicked off with the rise of emulation of the device (
https://www.vice.com/en_us/article/...mbitious-emulator-that-redefined-retro-gaming ) and later designs of flash carts (which continues to this day -- it has not been so long since Krikzz and everdrive took on things), possibly also some ROM hacking as it seems to be bringing all sorts of games out of Japan or fixing up things that might have fallen flat back in the day.
Given that later games lack source code (
https://www.theinquirer.net/inquirer/news/1014845/sega-loses-source-code-games ) because of bad retention practices I doubt even if you were given access to Nintendo's archives, a lot of time, could speak Japanese and knew business that you could piece together who got given the (usually sharply limited) supplies of lockout chips, and that is before we deal with the Tengen and Atari question (before Sega vs Accolade there was Nintendo vs Atari).